Company lists · Data refreshed September 2026
Top 25 Cleared security staffing agencies worldwide
RevenueBase identified 2,128 cleared security staffing agencies worldwide as of September 2026 and tracks 68,013 professional contacts across them, including 4,962 with verified work emails. The United States is the largest market and London the largest hub.
This list covers cleared security staffing agencies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 27, 2026. Country and city lists for cleared security staffing agencies follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest cleared security staffing agencies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 15,652 contacts → | ||||
Strong evidence “Offering flexible solutions for all of the UAE’s staffing needs since 2001, Transguard Group is the region’s most trusted expert in security, facilities management, cash services…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,853 contacts → | ||||
Indirect evidence “As the most successful Alaska Native village corporation, Chenega figures prominently in the diverse government services contracting marketplace supporting defense, intelligence…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,781 contacts → | ||||
Indirect evidence “Whelan’s commitment to quality and service has made us one of the foremost respected, successful and fastest growing companies in the industry.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,632 contacts → | ||||
Indirect evidence “Over 90 years of protecting the things that matter, we’ve seen more than most.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,375 contacts → | ||||
Partial evidence “Guardsmark, LLC provides security services.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,081 contacts → | ||||
Partial evidence “Twenty-five years ago Andrews International (AI) began forming a network of the world’s foremost security authorities and connecting with strategic partners for operations…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,062 contacts → | ||||
Indirect evidence “Founded in 1982, St.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 932 contacts → | ||||
Indirect evidence “As an established mid-market company, clients throughout the country entrust us as the best-qualified firm to protect their highest-value assets – while delivering the quality…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 782 contacts → | ||||
Indirect evidence “Now part of Allied Universal.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 741 contacts → | ||||
Indirect evidence “Known for our responsiveness, innovation, and customer-focused service, Akal provides officers and specialized training to a broad range of clients.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 736 contacts → | ||||
Partial evidence “Commissionaires manages the largest digital fingerprinting infrastructure in Canada, all while growing the diversity of physical, electronic and cyber security employment…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 677 contacts → | ||||
Partial evidence “OMNIPLEX World Services Corporation is a leader and innovator in delivering professional background investigations, intelligence support, and physical security services to…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 615 contacts → | ||||
Indirect evidence “Att hitta rätt person till rätt plats – det är vår kärnkompetens.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 541 contacts → | ||||
Partial evidence “A premier provider of staffing solutions, Tech USA is in the top 1% of the Recruiting Industry.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 514 contacts → | ||||
Indirect evidence “COMMITTED PEOPLE.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 498 contacts → | ||||
Indirect evidence “Empresa de seguridad privada, Chilena, proveedora de servicios integrales, con productos y servicios en las distintas áreas de la seguridad.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 448 contacts → | ||||
Indirect evidence “A Prestibel opera no mercado desde 1985 e é especializada na prestação de serviços de segurança privada, tanto na vertente da vigilância humana como na vertente de vigilância…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 433 contacts → | ||||
Strong evidence “ClearanceJobs.com the largest security-cleared career network, specializes in defense jobs for professionals with security clearances.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 376 contacts → | ||||
Indirect evidence “Elite staffs events and facilities with professionals who create a safe and secure environment.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 350 contacts → | ||||
Indirect evidence “STM Group (UK) Limited is an award-winning company, providing bespoke manpower service solutions.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 338 contacts → | ||||
Partial evidence “For over 50 years, Master Security has provided outstanding security services for state and federal government agencies and private enterprises.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 337 contacts → | ||||
Partial evidence “CTR Group provides staffing and recruiting services across the United States.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 327 contacts → | ||||
Partial evidence “Securitas Polska Sp.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 327 contacts → | ||||
Partial evidence “Founded in 1989, The Midtown Group pioneers 360-degree staffing services and solutions for organizations across both public and private sectors.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 326 contacts → | ||||
Indirect evidence “Peerless Technologies Corporation is a nationally recognized, award-winning, and reputable business serving federal government clients at more than 25 locations nationwide.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: cleared security staffing agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names cleared security staffing agencies.
- Partial evidence
- Its own public description names part of cleared security staffing agencies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name cleared security staffing agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 2,128 cleared security staffing agencies worldwide
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Cleared security staffing agencies worldwide at a glance
As of Sep 27, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among cleared security staffing agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for cleared security staffing agencies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “cleared security staffing agencies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names cleared security staffing agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among cleared security staffing agencies, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 4,962 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 27, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Cleared security staffing agencies by location
7 lists · largest firstEvery Cleared security staffing agencies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Cleared security staffing agencies based in the United States848
- Cleared security staffing agencies based in India158
- Cleared security staffing agencies based in the United Kingdom148
- Cleared security staffing agencies based in Canada71
- Cleared security staffing agencies based in Australia66
- Cleared security staffing agencies based in the Netherlands62
- Cleared security staffing agencies based in Germany33
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names cleared security staffing agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many cleared security staffing agencies are there worldwide?
RevenueBase identified 2,128 cleared security staffing agencies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Transguard Group, headquartered in Worldwide, tops this list with the largest team on record.
Which country has the most cleared security staffing agencies?
The United States leads with 848 companies, followed by India (158) and the United Kingdom (148). Every cleared security staffing agencies list by country and city is linked on this page.
Which city has the most cleared security staffing agencies?
London leads with 49 headquartered companies, followed by New York (24) and Washington (20).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 4,962 verified decision-maker contacts tracked across these 2,128 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.